graham



(No Model.) I 3 sheets-sheet 1..

J. A. GRAHAM.

KNOT TYER FOR GRAIN BINDERS.

No. 397,355. Patented Feb. 5, 1889.

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22 Mai/61'.

N PETERS, Plwmutho n hqr. Washington, D. c,

(No Model.) 3 SheetsSheet 2. J. A. GRAHAM.

KNOT TYER FOR GRAIN BINDERS.

Patented Feb. 5, 1889.-

N. PFIERS, Phololxllmgmphnr. Wuhinglon. DC

(No Model.) a Shets-Sheet 3.

"J. A. GRAHAM.

KNOT TYER FOR GRAIN BINDERS.

Patented Feb. 5, 1889.

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PETERS. PIwOo-Ulhognphor. Walhingtnm 0.0

time STATES ATnfNt tries.

JAMES A. GRAHAM, OF MlLlVAUKEE, \VISCONSIN, ASSIGNOR TO THE ll Tr\YAI'KEE IIARVEQTER (lOh'lPANY, OF SAME PLACE.

KNOT-TYER FOR GRAIN-BINDERS.

SPECIFICATION forming part of Letters Patent No. 397,355, dated February5, 1889.

Application filed February 8, 1886. gerial No. 191,179. (No model.)

To all whom, it may concern.-

Be it known that I, JAMES A. GRAHAM, of Milwaukee, in the county ofMilwaukee, and in the State of 'Wisconsin, have invented certain new anduseful Improvements in Knot-Tyers for Grain-Binders; and I do herebydeclare that the following is afull, clear, and exact descriptionthereof.

My invention relates to knotting mechanism of grain-bimlers; and itconsists in certain peculiarities of construction and combination ofparts to be hereinafter described with reference to the accompanyingdrawings, and subsequently claimed.

In the drawings, Figure 1 represents a side view of a"knotter-frameembodying my invention; Fig. i, a rear view of the same. Fig. 3 is anenlarged perspective view looking from the rear; Fig. 4, a detail viewof the camwheel; Fig. 5, a detail view showing the knotter in its normalposition and the cord laid thereon; Fig. 0, a plan view of the partsshown in Fig. 5, the shank being illustrated in transverse section; Fig.7, a detail view showing the position of the cord with relation to theknotter after the latter has made a quarterturn; 8, a transverse sectionshowing the knotter-bill and cord in plan and in the same relativeposition as shown by Fig. 7; Fig. 9, an elevation of the knotter, thecenters of the shank and bill being indicated by dotted lines; and Fig.10, a view of the knotter, partly in transverse section and partly inplan, the relative centers of the shank and bill and the action of saidknotter being illustrated by a diagram in dotted lines.

Referring by letter to the drawings, A rep resents the lmotter-l'rame;B, the cam-wheel, provided with tracks a l) c and a rack, (Z, the lattercoming into mesh at the proper time with a bevel-pinion, (l, on alnlotter-shank, D, thathasits bearings in said knotter-frame.

The frame A is provided with studs fg at practically right angles to thecam-shaft E, and to these studs are respectively pivoted the usualknil'e-arm,ll, and bell-crank lever I. 'Iheknitearm II isprovided withthe usual cord-guide, K, the notch 71 of which receives the cord as theneedle enters the knotten frame.

The outer track, a, of thecam-wheel B is the delay-surface for thebevel-pinion C on the knotter-shank D, the central track, I), being thepath for the roulette on the l, ell-cranklever I, that operates thecord-guide K, and the inner track, 0, is the path for the roulette onthe knife-arm ll, the relative position of said roulettes being shown bydotted lines in Fig. 4C.

In the ordinary form of knotter the upper side of the bill F is flushwith the adjacent upper side of the shank D, and when said knotter isrotated there is a tenden ey to force the cord out toward the end ofsaid bill, thus making it easy for the latter to slip past said cordaresult that frequently occurs.

My knotter is so cast that a longitudinal line, i, drawn through thecenter of the lower jaw, F, of the bill does not intercept the axis j ofsaid knotter at right angles, as is the case in knotters of the usualconstruction, but forms a tangent, on the right of a circle, It, struckfrom said axis, as best illustrated in 1*- 10. As a result of thepeculiar construc tion just described, the upper pivoted jaw, G, of theknotter does not intercept the axis j of the device, but comes entirelyonthe right side of said axis, as best illustrated by Figs. 9 and 10.

The general construction and operation of the tyer mechanism being wellknown, I do not deem it necessary to describe the same at length, andwill therefore confine myself to the peculiar action of the knotter thatconstitutes my invention.

By the peculiar construction above described the working side of theknotter-bill, instead of being approximately flush with the adjacentside of the shank, as in the usual form of knotters, is offset from saidside of the shank a distance approximately equal to that between thelongitudinal line i drawn through the center of said bill and the axisj, on which the knotter revolves. In consequence of this constructiontherotation of the knotter does not cause the working side of Fig. 1.0,the line 1' being constantly at a tangent to the circle 7.: struck fromthe axis).

The operation j ust described insures against the disengagement ol" theknotter-bill and (0rd while a loop is being formed, regardless of thestrain upon said cord and the jarring of the machine.

Having thus fully deseribed my invention what I claim as new, and desireto secure by Letters Patent, is

Inaknotting mechanism for grain-binders, a luiotter havin the lower jaw01 its bill 'arranged with relation to the shank so that a longitudinalline drawn through the center of this jaw forms a tzingent to a eirelestruck

